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Sources, impact and management of water pollution - Coggle Diagram

- - - - Reduce the biological oxygen demand (BOD)
        
        Amount of oxygen it would use up if released directly into a river or lake
        
        Problem to the organisms
    - - Rich in organic matter
      - Disposed of into bodies of water
  - - - Flush toilet
        
        Holding tank
        
        Water seal
      - A pour flush toilet
        
        Water seal
        
        Water poured by hand to flush
    - - Sewer pipes = Sewerage
      - Septic system
        
        Underground, sealed settling tank
      - Pit latrine
      - Composition toilet
  - - - Coagulation treatment
        
        Particles in the water stick together and settle to the bottom of the container
      - Filtrated through sand
      - Desinfectant = Chlorination
        
        Chlorine is added
        
        To kill any disease-causinf organisms (pathogens) that may remain